That does seem to be pretty grainy.
Gianluca,
Here is a digital shot I took yesterday (in color) which I knocked to b&w. This morning I ran it through Nik SilverFX to see what I could get for grain. I think it is pretty grainy and sharp.
Astoria, Oregon was to be the NYC of the west. Or so they thought back in the day. Much of the city was built on pilings out over the river and tons and tons of salmon was canned there. In 1922 a fire destroyed almost all of the wooden structures. The canneries are gone but their pilings remain...
That's because you are a photographer whereas I'm just an opportunist snapper. Although we frequently visit this BLM Wildwood Recreational Area near Welches, these were off our usual wander and were snapped with an iPhone.